A STUDY ON THE SPATIO-TEMPORAL VARIATIONS IN AIR QUALITY OF KOLKATA CITY FROM 2010-2019
Paper Key : IRJ************872
Author: Diptyajit Bhakta,Chandra Sekhar Matli
Date Published: 05 Jan 2023
This paper evaluates the air quality at different locations in the city of Kolkata, capital of West Bengal, India. Geo-spatial and geographical information techniques were used to estimate the seasonal, monthly and spatial distribution of pollutants from the year 2010-2019. The interpolation technique of GIS is very helpful in establishing a visual change in the AQI values during the years. The data used in this project work is acquired from Central Pollution Control Board (CPCB) and West Bengal Pollution Control Board (WBPCB) web sites. An attempt was made to assess the variations in pollutants concentrations over different seasons of the year. Three pollutants viz. NO2, SO2 and particulate matter (PM10) are considered for the study for want of data. Results indicate that particulate matter is the most dominating pollutant, while NO2 and SO2 have remained within the permissible limit for major portion of the study period. The results also indicate that the pollutant concentrations are higher in Winter season (November February), while monsoon (July October) is the cleanest part. The spatial distribution image of Air Quality Index (AQI) during the winter months from 2010-2019 shows a pattern of deteriorating air quality. The study also suggests that the Dunlop bridge location is the most polluted region out of the four monitoring regions considered during the study, which is perhaps due to dominant industrial activities in that region.